Composite metal-work.



L. S. LACHMAN. COMPOSITE METAL WORK.

APPLICATION FILED FEB. 8, 1918.

PatentedSept. 10,1918.

ATTORNEYS miunmwcn s. mum's, or new Yonm'n. Y;

' MAN, a citizen oftheUnited' States,.-and av resident of New York, in the county of New. York and State of New York, have inventedi a welding operation by whichthe finished ing when the form of the elements 0 COMPOSITE METAL-WORK. y i

To all 'uihcm it may cohcem: Be it known that I,'LA.URENCE S. LAOH- certain new and useful Improvements in Composite Metal-.Work, of which the fol: lowing is a specification. I

My invention relates to composite metal work and more articularly to metal work which comprise a base preferably in the form of a plate and a tube projecting from'one face of'said plate and united therewith by awelded. union.

My invention comprises essentially a base provided with a flanged, opening, a tube fitted in said opening and projecting from one face of the base'and a welded'union formed between the edge of the tube and a welding piece engaging the edges of said elements and all united intov a homogeneous joint.. V

My invention further consists in the method of uniting two metal ieces in parallelism edge to edge by assemb ing them 4 side by side in contact, applying a uniting o contact with said edges and subjecting the whole to heating current and piece pressure to form a homogeneous union of all the pieces. e

The invention further consists in details of construction, more particularly herein after described and then specifiedin the claims.

, Figure l'is a vertical section of a piece. of finished composite metal work constructed in accordance with my invention.

Fig. 2 shows the elements assembled for joint Fig. 1' maybe produced.

Fig. 3 is aplan view of the welded unitini plate or piece used in forming the joint. 1g. 4. is a plan ofa modified form of plate or uniting piece that may be used in forming a joint similar to thatv shown in F1 1. J

Fig. 5 shows the parts assembled for weldplate illustrated in Fi i is employed. I

ig. 6'.is a vertical section-through th jointformed from the parts assembled as shown in Fig. 5.

Fig. 7 shows in detail one 'of the filler pieces used for'the welding .plate or piece shown in-Fig. 4. c

' App lication med many 8,1918. Sarita 110115377.

form of a tube;

"surface of the plate 1.* The p Fig.8 is a plan of the 'oint made from the partsassembled as in ig. 5.

1 indicates the'base element or plate and projecting element in the The element 1 on the face opposite that from which the tube projects is provided with a countersink indicated at 3 which maybe formed by apress or die and whichpermits all portions of the finished union to be located below the floor 2 indicates the inem or Letters Patent. Patent d Sept. 10, 1918.

or faceof the element 1 as indicated in Fig. 1. Said countersink ma be formed in a press or die so that a pro ection will be producedupon-the face of said plate-from which the tube 2' projects. The latter may be formed with acircumferential swell or projection fl by'an electric forging or other operation as well understood in the art, which is adapted to engage the annular projection on the face of plate 1 opposite the countersink. In the plate 1 there is'formed a flanged opening adapted to receive the tube 2 and having its flange 6 projecting away from the face from which the tube projects. '7 indicates a welding plate -or piece. 1n the finished joint the edges of the countersink and the plate are welded together and to said plate in a homogeneous ']OiI1t as. shown in Fig. 1 with the top sur v face .of the plate 7 preferably flush with the tion qassists'in holding the parts firmly tosurface of plate '1 made in producing the countersink, I

annular projec-- gether 'by engaging with the projection upon the The various elements of the joint prior to the electric welding operation in Fig. 2, the welding electrode which engages the plate 7 and furnishes the required heating current and pressure to produce the'welded union shown in Fig. 1

being indicated in dotted lines 18. It will be understood that the'fla-nge and the'edges of the tube which are united edge to edge are arranged in". parallelism with one another and preferably in light or imperfect contact with one another and with the plate .7 at the beginning of the operation which imperfect of the surface of the plate and the edges of I the pieces, furnishes a resistance for the contact together with the Imperfect contact heavy low voltage current that assists in welding are shownlassembled in their proper j .relation for union by bringing the same to welding heat prelimi-- v nary to the application of the pressure by which the three elements are united into a homogeneous joint shown in Fig. 1.

To assist in the welding operation, the uniting piece 7 may be provided with contact projections 9 indicated in Fig. 5 to form partial or imperfect contact between the plate or uniting piece 7 and the edges of the tube and the flange. These projections may be struck up in the piece 7 in a die or press, the result of which operation is obi'iously the formation of depressions as indicated at 10 in the plan View Fig. l. \Vhcn the welding plate or piece has these depressions it is preferable to employ in conjunction therewith the filler pieces 10, one of which is indicated in the plan view Fig. 7..

These fillerpieces are of propersize to fit the depressions and are located therein prior to the welding operation, as indicated in the view Fig. 5.

The imperfect contact between said filler pieces and depressions results in the heating of the same when the joint is formed and produces a joint homogeneous or integral as .to all of the elements employed in producing the same and as-illustrated in the vertical section Fig. 1. Ordinarily, however, the outline of the filler pieces can be distinguished in the surface of the welded piece 7 when the joint is finished. By the use of the filler pieces a smooth surface is secured over the whole face of the element'l. It willbe understood however that I do not limit myself to any particular manner ofmodifying the flat welding piece shown in Fig. 2 to assist in the welding operation.

What I claim as my invention is -1. Metal work comprising a base, and a tube inserted in a flanged opening in the base and welded by its end to the edge of the flange and to a plate applied to the'flange and tube end to form a homogeneous or in tegral joint.

2. Metal work comprising a base, and a tub inserted in a flanged opening in the base and welded by its end to the edge of the flange and to a plate aap'lied to the flange and tube end to form a iomogeneous or in- ,tegral joint, said plate and welded joint being located in a countersink formed in the face of the base from which the flange proects.

3. Metal work comprising a base, and a tube inserted in a flanged opening in the base, said flange and tub end being welded to one another and to a plate applied to them into a homogeneous or integral joint.

at. A welding plate or piece provided with struck up weldln projections and having filler pieces welde into the depressions upon the unwelded face of said plate.

5. The method of uniting two metal pieces in parallelism edge to edge consisting in assembling them side by side in contact, applying a uniting metal piece in contact with said edges and subjecting the whole to heating current and pressure to form a homogeneous Welded union of all the pieces.

6. Welded metal work comprising a uniting piece welded into a homogeneous joint on one face-with the edgesof two other pieces arranged in contact side by side and having upon its unwelded face filler pieces welded into depressions therein.

Signed at New York, in the county of New York and State of New York, this 7th day of February, A'. D. 191 8.

LAURENCE sLACHMAN.

Witnesses: I

F. B. TOWNSEND, IRENE LEFKowI'r'z. 

